A bondservant of the LORD is one who (1) knows the LORD bought him, (2) willingly surrenders to the LORD, (3) sacrificially loves the LORD, (4) gladly works for the LORD, (5) realizes he prospers as a servant, and (6) doesn't want to leave the LORD for any reason - and thus, is worth multiples of hired servants.
When two in a covenant relationship with God meet in service to God, they can relate to one another in a deep common bond of THAT RELATIONSHIP - it is a 'praise God' meeting.